First of all, you can't go wrong with these options. It really does come down to your preference.
That said, I agree with several commenters who say the MCDC will be a struggle in a dress up situation. I can't see it working with a suit but I guess some people probably do pull it off... after all I've seen folks wearing U-Boat 50mm watches to work.
If I had to pick I'd say go with the Navy Seals Alarm. This is a more unique watch than either the PO or the MCDC, just my two cents. It does work with a suit, sort of, I recall Bill Clinton wore this onto a talk show and pulled it off nicely. It was not too loud.